Entry Guidance: A Unified Method

被引:257
|
作者
Lu, Ping [1 ]
机构
[1] Iowa State Univ, Dept Aerosp Engn, Ames, IA 50011 USA
关键词
NONLINEAR-SYSTEMS; ALGORITHM; REENTRY; TRAJECTORIES;
D O I
10.2514/1.62605
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
During the past five decades, entry guidance methods have gone through major evolutions, largely driven by the needs of different types of entry vehicles and greatly increased onboard computation capabilities. Numerical predictor-corrector algorithms have emerged in recent years to hold the potential to become the next prevalent entry guidance method. This paper aims at developing a method that is centered on a single baseline predictor-corrector algorithm and will be applicable to a wide range of vehicles with varying lifting capabilities for orbital as well as suborbital entry missions. Different needs for additional (vehicle-and mission-dependent) trajectory shaping and inequality constraint enforcement are met by appropriate augmentations of altitude-rate feedback to the baseline algorithm. In particular, the long-standing challenge of enforcing common inequality trajectory constraints (such as the heating rate and load factor) with a predictor-corrector algorithm is now satisfactorily overcome, for either low-lifting or high-lifting vehicles. The method is successfully applied to three very different vehicles, a capsule, a shuttle-class vehicle, and a high-lifting hypersonic gliding vehicle.
引用
收藏
页码:713 / 728
页数:16
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